(FIXED) Upload Speed aren’t the same as before

I have a NETGEAR CM500 cable modem and a NETGEAR WNDR4000 wireless router, and I have been using them for quite some time with absolutely no problems. I have the Blast! plan with 200mbps download and advertised for 10mbps upload speeds. While my download speeds are great (matches to my plan), I am not getting the upload speeds I used to have. I have a record of my speed tests I’ve done back in May where I was getting my upload speeds to 10 mbps, as I should have been. Then I was gone for the summer and put my plan on vacation mode to save money, then when I came back in August, my download speeds were fine, but my upload speeds are now around 5-6 mbps, and I have done everything that I could possibly do (restated modem/router, factory reset, disconnected and reconnected). No matter what I do, I can’t get my upload speeds back up. When I attempt to navigate through the Xfinity troubleshooter, it keeps prompting me to upgrade my modem for it “can no longer keep up with the internet speeds” even though my modem can (even when I go through the upgrade page, it says the modem is compatible with my plan), and I can’t get around that to get the troubleshooter to do anything helpful. I do enjoy playing video games and I do work online quite a bit, so the upload speed is important for me, and I understand that 5-6 mbps is usually good enough for most things, but I want to get what I’m paying for. I’m not sure what more I can do, any advice would be greatly appreciated, thank you !